Striding-motion driving gear for motor vehicles



V. ZBORIL 4STRIDING MOTION DRIVING GEAR FOR MOTOR VEHICLES Oct. 14, 1924.

Filed Aug.. 22 i922 2 Sheets-,Sheet 1 lime/1737* kik/mf [50p/7,

Oct. 1 4 1924.

v. zBQRlL- STRIDING MOTION DRIVING GEAR vFOR MOTOR, VEHICLES Filed Agg. 22, .1922 2 Sheets-Sheet 2 Patented Qct. .14, 1924.

UNITED STATES Application filed Augiist 22, 1922.-. Seal No. 553,644.

v B e itknO-wn, that/.L VoLAv Zlo'isir.,A a citizen of the Republic of Gzechoslavalria; andresiding at Bystritz a. Hostein,Y in the State of Czechoslovakia have invented cer-- tain .newz and useful Improvements in Striding-Motion Driving Gear of Motor Vehicles,V of which the. following is a sp'ci -Thisr invention' relates' yto driving gear for motor vehicles with striding levers moved by means' of cranks and is characterized by the fact that the' levers which ex-v l ecute the striding movementsserve as carrying members for the vehicle,` 'so that the usual wheels are dispensed with.: In the movement of the; stridinglevers the rotary motion of the driving crank is 'conv''ertedV 'into a horizontal and p-racticallywuniform motion of the ends ofthe levers which form the.; feet. f

For-the purpose just indicated thestriding levers', which, are .connected with devices by means of which they are elevated and depressed,` slide on ag guide roller, the

axis of which .is arranged beneath the. lowest pointv of the crank` circle at distance equivalent to about one-third-of the drame; v

ter of said circle7` While 'the' dista-nce of thev crank axle' from the ground is equivalen-tto approximately three times the diameter ofthe crank circle; Thus the normal stride of the levers for one-half revolution ,of t-he crank .amounts to approximately live and two-tenths times the length of the' crank.' y the accompanying d1awing2--`i i Y Figurel shows by way'of example, one-f fc-nstruotonal yform of the subject'pf thel` application;

Figuref2 isa `plan view of'one of the slide pieces for the guide rollers o-n`which the striding' lev ersf are f guided; Figure 3 is, aplan -view of the upper mem- ,fber `of .one of the toggle levers which are interposed between' the slide pieces. and the lower ends of the striding levers; and

, Figs.' 4, 5 and 6 illustrate. the manner in which one of the striding levers' is moved upon' ,rotation of omitted.-

4 designates the'axle of the vehicle upon which, inI ordinary vehicles, the wheels are mounted. Giuide rollers 3', on which striding levers 5 are guidechare mounted yto the crank, the feet beingA rotaterontlie axle.k 41.'. The levers(- 5 preferably are double T-shape in `cros section andere guided by means of narrow guideslots S,.Wl1`ich also ser-veto guiiilejthe' pins 6 df a pair of .cranks 9'; which .work t 18013 apartiand guide rollers?, which are:

rotataiolyl mounted' on saidpins 6,' in the' flan-ges on the' opposite sides of the' stridinggy levers. i f* A In the driving gears. fojr mot'o'r vehi'les are actuated by means of *cranksythef aile of tliedriving ,crank liesbelow' the aXl' df .the vehicle-so Athat the crankv pins on' thegstridinglever between the' ax'leof vehicle and the ground, whichv e'ffelctsonly a relative-ly short stridiig motion. z vccirdf `lngtoy t-hev presentinvention, however, the" axle 1 of theV drivingf crank 2 isarranged" above' theaxle 4; of the v'ehicleirf such man` neri th at' the distance.. of the' crankaxle 1 rori the ground line VB-Bfis apprdzimately equal tol the'y yperiphery of the, crank' cirl; and the lowernlrostpoint olf the' crank" circlev ylies at; adist-nice equal .tor approziinately one-third of; the ,dialnet-er of "said" circle" above the axle 41 of the lguidefrolrler'. For elevatingand depressingeach stri'd-v to the crank pini and is guided by Inteans striding lever,` ony which itca'n consequently only move longitudin'al'ly.r Y

' aperture" 11 in the 12 there' is coupled' to thiis'sli'de 'piece thet means of. its guide slot 16' on the roller 3.

In order to secure the edgeso'fthe guide slot `against .y premature wear,I they are strengthened by interchangeable steel 'striipsV 17; whichl arrangement can bev advanta the toggle lever 14 and 13;"a'1s`0'0ff. the. slide- .piece L.9 and the strid'ing lever 5.

Each ofthe' toggle?levers` 13 and 14. has? f bersv 21 to the corresponding striding levers.

The supporting feet are each provided at the rear with a calk 22 capable of being unscrewed, and with a plate 23 to prevent sinking into soft ground, whilst they are -provided at the front with an interchangeable plate 24 to permit a secure grip of the vehicle in the ground during the propulsion of the vehicle.

The operation of the device is as follows:

1 As may be seen from Figures 1, 4, 5 and 6,

both the driving motion and the conversion of the circular into a horizontal uniform motion of the endsof the striding-levers forming the feet is exclusively effected from the crank itself.

Vhen the crank 2 is in horizontal position (Figure 4), the striding element a shown in heavy lines, is already on the ground with its ends forming the feet while the striding element shown in thin lines,

which is guided by the opposite crank-pin` 6, is still on the ground. In this position the several parts of the striding members are stretched as far as possible, that is to i say, the slide piece 9 is so high on the striding lever 5 that-the two toggle lever arms 13 and 14 are in a stretched positionon the stridingv lever, thereby enabling the striding member to carry the weight ofthe vehicle and at the same time to move it forward; this lasts whilethe upper-halt of the crank circle is run through.

It the crank is moved upward for 45D in clockwise rotation, the striding members assume the positionl shown in Figure 1. The left crank-pin 6 is moved from point 8 of the crank circle to point 6 thereof and the foot end 15 of the ,striding member a has at the same time made its horizontal movement from point 8O to point 6o of the ground line B B.

The crank having again turned for 450 (Fig-5) the striding member alias reached the vertical line formed by the crank axle 1 and the axle 4 of the vehicle and when the crank is moved again for 450 (Fig. 6), the striding member a rests upon point 2 of the ground line B B and when the crank has passed lthrough the upper part of the circle, will bein the position 'of the striding member b shown in thin lines in Figure 4.

Vh'ile the crank is moved through the lower half of its circle the st-riding levers are lifted and rocked into operative position again. As soonas the crank-pin 6 is moved downward 'from the horizontal line for 45C the slide piece 9 attached thereto has been guided downward along the stridiiig lever 5 (Fig. 1) and has swung into the position shownin heavy lineszinf Fig. 4, in which the striding lever is again put on the ground. y l

The length or' the stride amounts to about live and two-tenths times the length of the crank, the vehicle during the movement remains exactly in its horizontal positioir without being provided with any special compensating devices. Two equal lengths (0-8) completed by the crank-pin correspond equal distances (0o- 80) passed by the end of the foot, so that a uniform progressive movement of the vehicle is ob-` tained. l

I claim: l l. A drivino gear for motor vehicles, having striding levers each moved by means oit' driving crank and in which the said levers serve as exclusive carrying, membersy for the vehicle, devices connected to said levers for elevating and depressing them, a

guide roller on which said levers slide, the

axle of which is arranged a distance approximately equal to one-third of the diami-l eter of the crank circle beneath the lowest point of such circle, while the distancev of they crank axle from the ground corresponds:

approximately to three times the diameter of the crank circle.-

2. A driving gear for motor vehicles, having striding levers moved by means of `a driving crank! and in which the said levers serve as exclusive carrying members for the vehicle, a toggle lever associated with? yeach striding lever having upper. Aand :lower arms, said toggle levers having guide slots therein and being mounted onthe striding lever, a guide roller operating in said slots, a member slidable on the striding levers to which said upper aim is pivotally connected, said member being pivoted by a pin-tol the driving crank, the lower arm of said toggle beingv pivotally connected tothe striding lever. n Y.

3. A driving gear forV motorivehicles having striding levers with guide slots therein, said levers being moved by means 'of driving cranks and serving as exclusive carrying members for the vehicle, a toggle lever associated with each striding lever having upper and lower arms, said toggle lever having a guide slot therein and being mounted on the striding lever, a guide roller operating in said slot, a striding lever slide slidable on the striding lever to which said upper arm is pvotally connected, said lever slides being pivoted by a pin to 'the driving crank, the pin of the driving crank moving the striding lever slides in the upper part of the guide slot in this lever, an axle projecting into the guide slot of each striding lever at a point beneath the circular path of the driving crank, a guide roller on each axle riding in said slot, the lower armv of said toggle being pivotally connected lto the striding lever.

Il. A driving gear for motor vehicles having striding levers with guide slots therein, said levers being moved by means of driving cranks and serving as exclusive carrying members for the vehicle, a toggle lever associated with each striding lever having upper and lower arms, said lever having a guide slot therein and being mounted on the striding lever, a guide roller operating in said slot, a striding lever slide slidab-le on the striding lever to which said upper' arm is pivotally connected, said lever slide being pivoted by a pin to the driving crank, the pin of the driving crank moving the striding lever slides in the upper part of the guide slot in this lever, an axle pro jecting into the guide slot of each striding lever at a point beneath the circular path of the driving crank, a guide roller on each axle riding in said slot, the lower .armof said toggle being pivotally connectedto the striding lever, and means for adjusting the length of stroke of the striding lever;

5. A driving gear for motor vehicles having striding levers with guide slots therein, said levers being moved'by means of driving cranks and serving as exclusive carrying members for the vehicle, a toggle lever crank, the pin of the driving crank moving` the striding lever slide in the upper part of the guide slot in this lever, an axle prolever at a point beneath vthe circular path of the driving crank, a guide roller on each axle riding in said slot, the lower arms of said toggle being pivotally connected lto the striding lever, means for adjusting the length of stroke of the striding lever, pivot= ally mounted 'supporting feet having a calk capable of being unscrewed and with a plate to prevent sinking into soft ground, said `jecting into the guide slot of each stridingv feet being also provided at the front' with.-

an interchangeable plate.

In testimony whereof I ailix `my signature in the presence of two witnesses.

p VCLAV ZBORIL.

Witnesses:

THOMAS GUNDRIGH, JOSEPH CALM. 

